Furnace.



N. BUCK.

FURNACE.

APPLICATION FILED APR. 3; 1916.

N. BUCK.

FURNAC.

APPLICATION HLED APR.3.1916'.

2 SHEETS-SHEET 2. l

turnen sra'rss ra'rnnfr orrrcn NIELS BUCK, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE EUREKA SMOKELESS IEURNACE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FURNAGE.

resalta.

To all whom z' may concern.'

Be it known that I, Ninns BUCK, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful 11nprovement in Furnaces, of which the following is a full, clear, concise, and'exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to furnaces and has for its object the provision of an improved arch structure for furnaces of the class in which a dividing wall or arch is used to divide the lire box from the combustion chamber'.

My invention concerns itself primarily with the style of construction of an arch of this character, which arch provides suitable channels for the intermixing of gases and air.

In the preferred form of my invention the arch structure is designed to provide a mixing chamber for the uncombusted or partially combusted gases from the fire box and the air which may be taken from without the furnace, the arch then providing suitable ducts or channels to direct this mixture into the combustion chamber which is found immediately to the rear of the arch.

I will explain my improved arch more in detail by referring to the accompanying drawing in which- Figure 1 is a side view partly in section of a furnace constructed in accordance with my invention;

Fig. 2 is a detail front view of the arch structure partly in section;

Fig. 3 is a side view of the arch structure;

Fig. 4 is a detail View of one of the elements entering into the construction of my improved arch, and

Fig. 5 is a view of a modified form of arch structure.

Referring particularly to Fig. 1, I show a furnace having the boiler 1 and the grate structure 2. The chamber immediately above the grate is subdivided by the arch structure 3 into a fire box 4, and combustion chamber 5. The arch itself is shown more clearly in Fig. 2, the arch extending entirely up to the top wall 6 and being iiush with the side walls of the furnace, but having an opening 7 through which the combustion chamber and fire box communicate directly. In the ordinary operation of the Speccaton of Letters vPatent. Patented July 11",? 1.91 7.

Application filed April 3, 1916.

Serial No. 88,516.

furnace the burning coal rests mainly to the front of the arch structure, sloping gradually downwardly from the line 8 in Fig. 1. The coal thus in general closes up the opening 7 when the fui-mice is in normal operation.

The improved arch structure is designed to conduct gases from the fire box through the channels 9 and 10 into the interior of the arch which is entirely hollow as shown` more clearly by dotted lines in Figs. 1, 2 and 3. The channels 9 and 10 open into the vertical ducts 11 which are part of the hollow interior of the arch, which ducts lead downwardly directly communicating with open portions 12 provided in the tile elements 13, 14e, 15, 16 and 17. The tile elements 14, 15 and 16 are arranged as more clearly shown in' Fig. 1, they having the continuous side elements 18, 18 and center portions 19 of a less extent, thus to provide channels 12 as is clearly apparent. The tile elements are also provided with lugs 20 so that the elements may interlock and be Se curely held in position. The interior of the elements 13, 14:, 15 and 16 are also hollow as indicated at21. 'It will thus be seen that the channels 11 communicate directly with the channels l12 which are formed by two adjoining elements such as the tile elements 14 and 15. The tile elements 13 and 17 have channels which are part of channels 22 which communicate directly with the open air beneath the grate as these elements 13 and 17 rest upon tile elements 23 and 24 which are placed directly above the grate structure. The channels 22 are continuous through the elements 23 and 24 so that fresh air can pass upwardly through the ducts 24: into the hollow arch structure where it meets with the uncombusted gases entering the openings 9 and 10 and pass down through the channels 11 into the interior of the elements 13'to 16. The mixed gases are then conducted outwardly through the lower channels 12a into the space below the arch where these gases pass directly into the combustion chamber 5, these gases being of sufficient heat of course to burn in the combustion chamber, thus to secure complete combustion and economy in fuel consumption. The structure above the elements 13 to 17 may of course be made of ordinary fire brick or other suitable fire resisting material so long as the brick are arranged to provide openings where the uncombusted gases may enter `and pass downwardly through this brickvr` structure Yinto the interior space of l the elements 14 to 16, which provide the mixing chamber, v

In Fig. .I show a furnace structure similar to that shown in Figs. l to 1, but instead offhaving the elements 23 and 24 with their ducts v22, I provide pipes 25 which extend from below the grate into-i the interior Vof the tile elements 18, let, 15, 16 and 17. rIhe air is thus conducted from belowY the grate into the interior of the hollow arch asbefore, as 'will be readily apparent. Y

From what'has been thus described the nature `of my invention will be readily clear tothose skilled in the art, as will alsorits various modifications. Having however thus described one form which take, what I claim as new and desire to secure by Letters Patent is:

e V1. -A furnace structure having a grate together with a fire box, and combustion chamber above said grate, in kcombination with an arch above said grate Aand dividing the space i125.

above said grate into said fire box and combustion chamber respectively, said arch comprising apairof end supports, a plurality of hollow interlocled. tile elements carried by said end supports, masonry work above and 'adjacent to said tile elements, said masonry work havinga plurality of channels leading downwardly into the interior of said tile elements, ducts through the face of 'Y said masonryworlr next the fire box extendf ments, and

Y said hollow bustion ing intosaid channels above said tile eleducts leading outwardly from tile elements t-oward the comichamber, Vthe hollow interiors of saidtile elements forming a mixing chamber continuous throughoutsaid stile elements wherebythe first aforesaid ducts communiy kcate with the fire lbox. to receive the gases Y therefrom, and the second aforesaid ducts plurality of` hollow said end supports,

l lead into the combustion chamber. 45

j masonry work next ythe fire box extending into said channels above said tile elements, and ducts rleading outwardlyk through Ysaid hollow tile elements toward the combustion chamber, the hollow interiors of said tile j'elements forming a mixing chamber conkpiesjof this'patent may beobtained'for. ve cents each, by addressing the Commissioner f' l` Y "Washington, D. C.

my invention may tinuous throughout said tile elements whereby the first aforesaid ducts communicate with the lire box to receive the gases therek from, and the second aforesaid ducts lead into the combustion chamber.

3. A furnace structure having a grate together with a lire box, and combustion chamber above said grate, in combination with an arch above said grate and dividing the space above said grate into said fire box and combustion chamber respectively, said arch comprising a pair of end supports,va plurality of vhollow interlocked tile elements carried by said end supports, masonry work above and adjacent to said tile elements, said masonry work having a plurality of channels leading downwardly into the interior of said tile elements, ducts through the face of said masonry work next the iire box extending into said channels above said tile elements, and ducts leading outwardly through said hollow tile elements toward the combustion chamber, and means for supplying fresh air to the interior of said hollow tile elements, the hollow interiors of said tile elements forming a mixing chamber continuous throughout said tile elements whereby the first aforesaid ducts communicate with the firebox to receive the gases therefrom, and the second aforesaid ducts lead into the combustion chamber.

f1. A furnace structure having a grate t0- gether with a fire box and combustion chamber above said grate, in combination with an arch above said grate and dividing the space above said grate into said fire box and combustion chamber respectively, said arch comprising a pair of end supports, a plurality of hollow tile elements carried by said end supports, masonry work above and adjacent to said tile elements, said masonry work having a plurality of channels leading downwardly into the interior of said tile elements, ducts through the face of said masonry work next the fire box extending into said channels above said tile elements, and ducts leading outwardly through said hollow tile elements toward the combustion chamber, and means f-or supplying fresh .air to the interior of said hollow tile elements, the hollow interiors of said tile elements forming a mixing chamber continuous throughout said tile elements whereby the iirst aforesaid ducts communicate with the lire box to receive the gases therefrom, and the second aforesaid ducts lead into the combustion chamber.

In witness whereof, I hereunto subscribe my name this 14th day of March, A. D. 1916.

NIELS BUCK.

Witnesses Renn BURLINGAME, HATTIE LAwsoN.

of Patents, 

